I have pdf files that have proper thumbnails, yet I get an error on using a command such as this
savethumb(<curitem>, "p_i_c_1.jpg", 720,, "jpg100","4",2);}
The error throw out is, "Invalid image file". It seems like I should be able to save a thumbnail as a jpg thumbnail file as in the example. The error is present regardless of the border or zoom-to-fill options. Thanks.